Soars, J., & Soars, L. (1991). Headway - Pre-intermediate: Teacher's book. Oxford: Oxford University Press.
Stile di citazione ChicagoSoars, John, e Liz Soars. Headway - Pre-intermediate: Teacher's Book. Oxford: Oxford University Press, 1991.
Citazione MLASoars, John, e Liz Soars. Headway - Pre-intermediate: Teacher's Book. Oxford: Oxford University Press, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.